NCN4557 datasheet(8/12 Pages) ONSEMI

Part #	NCN4557

Description	1.8 V/3.0 V Dual SIM/SAM/Smart Card Power Supply and Level Shifter

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Manufacturer	ONSEMI [ON Semiconductor]

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NCN4557

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TYPICAL CHARACTERISTICS

Figure 4. IBAT Operating Current vs. VBAT,

TA = 25°C, ICC = 0 mA

Figure 5. IBAT Shutdown Current vs. VBAT

VBAT (V)

5.5

5.1

4.7

4.3

3.9

3.5

3.1

2.7

20

22

24

26

28

30

5.5

5.1

4.7

4.3

3.9

3.5

3.1

2.7

0

0.2

0.4

0.6

0.8

1.0

1.2

Figure 6. IVDD Shutdown Current vs. VDD,

TA = 25°C, VBAT = 5.5 V

Y AXIS LABEL (UNIT)

5.8

5.4

5.0

3.8

3.4

2.6

2.2

1.8

0

10

20

30

40

50

Figure 7. Activation Sequence, Ch1 : CRD_VCC,

Ch2 : CRD_IO, Ch4 : CRD_RST, Ch3 : CRD_CLK

Figure 8. Automatic Deactivation

Ch4: CRD_RST, Ch3: CRD_CLK, Ch2: CRD_IO,

Ch1: CRD_VCC

Drop−out

CRD_VCCA/B = 3.0 V

CRD_VCCA/B = 1.8 V

−40

°C

25

°C

85

°C

3.0

4.2

4.6

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